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Finding the Fourth Proportional to 221,300.80, 332,080.80 and 81,073.60

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Solution

The fourth proportional to 221,300.80, 332,080.80 and 81,073.60 is: 121,657.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,300.80 : 332,080.80 = 81,073.60 : x
  2. Step 2: Convert to fraction form
    221,300.80/332,080.80 = 81,073.60/x
  3. Step 3: Cross multiply
    221,300.80x = 332,080.80 × 81,073.60
  4. Step 4: Simplify right side
    221,300.80x = 26,922,985,946.88
  5. Step 5: Solve for x
    x = 26,922,985,946.88/221,300.80
  6. Step 6: Final answer
    x = 121,657.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.